const rl = require("readline").createInterface({ input: process.stdin })

// https://www.nowcoder.com/practice/9a763ed59c7243bd8ab706b2da52b7fd?tpId=37&rp=1&ru=%2Fexam%2Foj%2Fta&qru=%2Fexam%2Foj%2Fta&sourceUrl=%2Fexam%2Foj%2Fta%3Fpage%3D1%26tpId%3D37%26type%3D37&difficulty=&judgeStatus=&tags=&title=&gioEnter=menu

class Developer {
  constructor() {
    this.line_count = 0
    this.l_arr = []
    this.l_num = 0
    this.r_arr = []
    this.r_num = 0

    this.data = []
  }

  static _bubbleSort (arr) {
    for (let i = 0; i < arr.length; i ++) {
      for (let j = 0; j < arr.length - i; j ++) {
        if (parseInt(arr[j]) > parseInt(arr[j + 1])) {
          arr[j] = [arr[j + 1], arr[j + 1] = arr[j]][0]
        }
      }
    }

    return arr
  }

  input (line) {
    const [num, ...rest] = line.split(' ')

    if (this.line_count === 0) {
      this.l_arr = rest
      this.l_num = num
    }
    if (this.line_count === 1) {
      this.r_arr = [...new Set(Developer._bubbleSort(rest))]
      this.r_num = num

      this.setData()

      rl.close()
      return
    }

    this.line_count ++
  }

  setData () {
    let data = []
    for (let i = 0; i < this.r_arr.length; i ++) {
      const r_item = this.r_arr[i]
      data = data.concat(this.getMatch(r_item))
    }

    if (data.length) {
      data.unshift(data.length)
    }

    this.data = data
  }

  getMatch (r_item) {
    const fn = (str, subStr) => {
      return str.indexOf(subStr) !== -1
    }

    const arr = []
    let num = 0 // 存在几个
    for (let i = 0; i < this.l_arr.length; i ++) {
      if (fn(this.l_arr[i], r_item)) {
        num ++
        arr.push(i)
        arr.push(this.l_arr[i])
      }
    }

    if (num > 0) {
      arr.unshift(num)
      arr.unshift(r_item)
    }

    return arr
  }

  output () {
    console.log(this.data.join(' '))
  }
}

const developer = new Developer()

rl.on('line', (line) => {
  developer.input(line)
})

rl.on('close', (line) => {
  console.log(developer)
  developer.output()
})
